new school

hi everyone, i’m a freshman in high school. i recently attended a middle college with less than 200 people but unfortunately i moved to a place outside of the county line so i now have to go to a normal high school with over 1000 people!!!!!!!!!! i am, naturally, scared most for the social aspect like lunch. does anybody have any tips? ive switched schools plenty of times but this time is different because of the culture shock. thank you anything helps!!!